Concrete construction.



J. H. KNOX.

CONCRETE CONSTRUCTION.

APPLICATION FILED JUNE 11, I913.

Patented June 8, 1915.

2 SHEETS-SHEET 1 lNV ENTOR JeczzzJ-Jfizax W ATTORNEY J. H. KNOX.

CONCRETE CONSTRUCTION.

APPLICATION FILED JUNE 11. 1913.

1,142,259. Patented June 8, 1915.

2 SHEETS-SHEET 2.

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THE NORRIS PETERS 60., PHom-LITHQ, WASHINGTON, D C

JEAN H. KNOX, OF OAKLAND, CALIFORNIA.

cononnrn CONSTRUCTION.

Specification of Letters yatent.

Patented J 111168, 1915.

Application filed June 11, 1913. Serial No. 772,968.

To all whom it may concern Be it known that I, JEAN H. KNOX, citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Concrete Construction, of which the following. is a specification.

This invention relates to a method of concrete construction, and particularly to the construction of bridge and pier members, the principal object of the invention being to provide a form for the reception of the concrete which is noncentering, needs no supporting falsework and which may be taken down and used over again any number of times. i Y

Another object is to provide such a form which will both determine the shape of the concrete poured therein and support the i I v portlon same while setting.

A third object is to provide such a means as can be easily and quickly set up and taken down.

A fourth object is the elimination of accidents occasioned by use of the unstable falsework as at present employed.

These and other objects I accomplish by means of the particular arrangement and adaptation of parts as hereinafter described and shown in the accompanying drawings, in which:

Figure 1 is a perspective view of a set of my improved concrete forms as set up for use. Fig. 2 is a side elevation partly broken out, of one of the arch members. Fig. 3 is an enlarged cross section on a line 3-3 of Fig. 2.

On the drawings, similar characters of reference indicate corresponding parts in the several views.

Referring now more particularly to the drawings, and to the figures of reference marked thereon, 1 represents the piers or abutments of the bridge or other design under construction. These piers are set up by any desired method, and are then coupled in pairs by means of hoops or hands 2 placed over the top of same, having tension rods 3 connected therewith, these rods being in turn connected by a turnbuckle 4 by means of which the tension may be regulated.

On top of these piers and seating thereon are members 5, which are made up of two V-shaped plates 6 the width of the pier,

fastened together and across the pier by angle irons 7, the bottom ones of which form a fiange or seat for the piers 1. These angles are riveted on so that they will-present a face all around toabut'againstthe adjacent members 8, the top and bottom edges of which are curved to conform to the radius of the arch to be constructed. These members 8 and their adjacent members '9 are formed of bottom and side plates 10 and 11' of the respectively required sizes, and are also connected together andbraced by angle irons 12, the faces of which along the edges of the ends are adapted to engage with the corresponding faces of the angles 7 of the members 5 and the corresponding faces of the angle irons12'of members 9. These angle irons are drilled at intervals to admit of bolts 13 being used to couple the difierent members together when it is desired to set a c p a 11 of the adjacent side plates 11 of the members 8 of two arches is removed, and a trough 14 to connect two adjacent openings is formed in a manner similar to members 8 and 9 i. e., side and bottom plates 15, and reinforcing and connecting angle-irons 16, the end ones of which are adapted to be removably bolted to the members 8 of both arches. The length of these trough members 14 is of course determined by the distance apart of the piers 1.

It will be noticed that the V-shaped members 5 are isosceles triangles, having the connecting angles 7 on both sides thereof, thus rendering the same reversible, and if convenient and desired additional members 8 and 9 may be set up on the present disconnected side of members 5 to form more arches.

It will also be obvious that the portion 11 maybe cutout of side plates 11 on both sides thereof and at'any points desired, and that there may be any number of the sections 9, should the length of the arch to be constructed or other reason render such neces sary.

In operation, the form as a unit is set up as shownor with additional arches as stated-and the concrete poured in from the top. This fills up the space between the plates of the arches and also the troughs 14. When the concrete has set, the various sections of the form are unbolted and each one taken down. There will then be set up integral with the piers 1, and with each other, suitable arch ribs and connecting brace beams. The bands and rods 2-3 are for the purpose of preventing any possible spread of the piers While the Weight of the forms and concrete is on them, before the setting of the latter.

Thus it Will be seen that I have perfected such a device as substantially fulfils the ob- "jects of the invention as set forthherein.

While I have here described and shown the present and preferred embodiment of my invention, still in practicesuchdeviations fromsuch detail may be made as do not depart from the spirit of the invention.

I claim:

l. A mold adapted to form a unitary monolithic structure, comprising a plurality o'fsections adapted to form an arch form, angle irons adjacent the junctures of said sections, and obliquely disposed thereon, being adapted to uniteand reinforce adjacent sections,'piers supporting said molds, seat sections intermediate said piers and arch sections, said sections adapted to form a continuous U-shaped trough, and means secured tov said piers, adapted to retain the mold. in adjusted position, substantially as described.

copies of this patent may be obtained for five cents each, by addressing the 2. A form for concrete arch construction, comprising a pair of arch forms, each of which is built up of a plurality of sections, each of said sections having side and bottom plates, said side plates being spaced apart the Width of the arch rib required, the same being reinforced at their junctures by suitably disposed angle-irons, the flanges of the angle irons Whichlie along the bottom and side edges of any one section abutting against the corresponding flanges of the angles of the adjacent sections, means for connecting said flanges together, and opentop trough members connecting said two arch-forms from any two coinciding sections of each arch form, the said troughs opening into the interior of each arch-form and being removably connected therewith whereby brace beams will be formed integral With the concrete arch-ribs as set forth. 7

In testimony whereof I afiiX my signature in presence of tWo Witnesses.

JEAN H. KNOX.

Witnesses:

F. P. SoHRoEDER, R. M QYARzo.

Commissioner of Patents,

Washington, D. G. 

